## TK Solver ‘Backsolving’ Means Faster, Better Electric Motor Designs |

Joe Gardner speaks plainly and simply about the usefulness of the backsolving feature in TK Solver and when he does, you have to listen. |

The design engineering manager has 41 years of experience designing custom-built electric motors for Hansen Corporation of Princeton, IN. He has three bachelor’s degrees—two in engineering and one in business administration, and is a Registered Professional Engineer in Indiana. |

“The backsolving feature—that’s the beauty of TK Solver,” Gardner says. “It’s unique. With TK Solver we can arrive at a design in 30 to 60 minutes, in what otherwise would have taken a day or two.” |

TK Solver, from Universal Technical Systems, Inc., is still the only software application in the industry that automatically backsolves — meaning you can use any variables as inputs and get calculated outputs on any other variables. |

No two of the motors that Joe Gardner designs are alike; one might be used in an office printer while another in an ATM. Backsolving allows Gardner to instantly swap inputs and outputs to quickly optimize a design. He can enter the performance criteria that he needs into the TK Solver model and solve for the design parameters that produce these results. |

“I can put in the voltage, torque, and speed at two different points and solve for armature resistance, brush top voltage, torque constant, and frictional torque loss,” Gardner says. |

He also likes the declarative structure of TK Solver. The mathematics in his motor design models amounts to three pages of linear and non-linear equations. In the GW BASIC that Gardner formerly used, each equation had to be expressed a different way for each variable he wanted to solve for and each variable being solved for had to be isolated. But with TK Solver, it’s a matter of simply entering equations, in any order, without isolating variables, and without any tedious and time-consuming coding. |

What does this mean for Gardner and for Hansen Corporation? It means they can spend less time on complex calculations and more on their core business. It means faster, better motor designs that exceed customer expectations and according to Gardner, realize “significant” savings in time and costs. |

Gardner has used TK Solver in his design work since 1987 when the company began using UTS gear design and manufacturing software that incidentally, is powered by TK Solver. “It didn’t take long for us to use it for other things,” Gardner says. |

The unique backsolving functionality in TK Solver is further augmented with the Solution Optimizer, which lets you set preferences and limits in solving a TK Solver model. The Solution Optimizer is available in the TK Solver 5.0 Premium Edition. |

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